$ git clone -n https://src.fedoraproject.org/rpms/lftp.git /var/lib/mock/f45-build-15706-478/root/chroot_tmpdir/scmroot/lftp
Cloning into '/var/lib/mock/f45-build-15706-478/root/chroot_tmpdir/scmroot/lftp'...
$ git fetch origin 1c1b37cd2409e2d1a0275db7fcb0612bdca06257:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/lftp
 * [new ref]         1c1b37cd2409e2d1a0275db7fcb0612bdca06257 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 1c1b37c Rebuilt for https://fedoraproject.org/wiki/Fedora_45_Mass_Rebuild